1. Key Laboratory of Interface Science and Engineering in Advanced Materials
2. Ministry of Education
3. Taiyuan University of Technology
4. Taiyuan 030024
5. P. R. China
6. Printable Electronics Research Center
7. Suzhou Institute of Nano-Tech and Nano-Bionic
8. Chinese Academy of Sciences (CAS)
9. Collaborative Innovation Center of Suzhou Nano Science and Technology
10. Suzhou 215123
11. CAS Key Laboratory of Nanosystem and Hierarchical Fabrication
12. CAS Center for Excellence in Nanoscience
13. National Center for Nanoscience and Technology
14. Beijing 100190